Overview

The payment processor verifies the CVV2 (card verification value) in a credit card transaction and sends a response code that indicates the results of the validation check. You cannot accept an order if the payment processor returns a failure response code.

These response codes are provided for informational purposes only and are subject to change without notice. Approval should be determined using the authorization response code and not be based on these specific response codes.

Response Codes

Response Code

Description

Action

M

CSC match

Good, send order

N

CSC no match

Consumer fix required, resend

P

CSC validation not performed or not requested

Accept order – system issue

S

Card issuer states CSC on card but merchant did not provide

Accept order – system issue

U

Card issuer not certified for CSC validation; check not performed

Accept order

X

CSC validation service provider did not respond

Accept order

0

CSC validation service not available

Accept order

T CSC for new card purchase tx with temporary CVV/CSC Accept order